I have listened to RolandRadio quite a lot lately, especially at around 11pm for at least one hour, mostly two (while coding, of course

). I have already told you the shuffle algorithm was not good enough in my opinion. Now I have the proof! The same songs always come up (I still didn't hear the latest songs I uploaded).
What I did is very simple: thanks to your Playlist webpage, I copied/paste the yesterday's playlist, did the same today and compared the result. For one hour, here is the result:
1 12542 2020-03-26 23:58:42 Tarann Ltd Afterburner - Theme 2 PLAYED yesterday at 23:50:33
2 12656 2020-03-26 23:55:32 Unknown Artist The Race Against Time For Sport Aid'88 (Games without frontiers) PLAYED yesterday at 23:13:32
3 12105 2020-03-26 23:53:08 Unknown Artist Magicland Dizzy - Main Menu PLAYED yesterday at 23:31:30
4 12214 2020-03-26 23:52:37 Unknown Artist Monty Python's Flying Circus PLAYED yesterday at 23:37:15
5 12223 2020-03-26 23:52:35 Unknown Artist Mountain Bike Simulator - Start Game NOT PLAYED yesterday
6 12316 2020-03-26 23:51:11 Unknown Artist Prison Riot - Highscore PLAYED yesterday at 23:49:08
7 11708 2020-03-26 23:50:05 Unknown Artist Freddy Hardest PLAYED yesterday at 23:08:33
8 12259 2020-03-26 23:49:26 Unknown Artist Nonamed PLAYED yesterday at 23:52:37
9 13172 2020-03-26 23:49:17 RolandRadio Jingle - Ultrasyd (japanese) NOT PLAYED yesterday
10 11630 2020-03-26 23:47:51 Elie Daniel Fire! PLAYED yesterday at 23:07:07
11 12234 2020-03-26 23:45:42 Na th an Sir Ababol - Ingame PLAYED yesterday at 23:55:26
12 12874 2020-03-26 23:45:35 Unknown Artist Wriggler - Game Over NOT PLAYED yesterday
13 12821 2020-03-26 23:43:29 Unknown Artist Wanderer NOT PLAYED yesterday
14 12387 2020-03-26 23:41:11 Unknown Artist Rock'n'Roll - Ingame PLAYED yesterday at 23:02:08
15 12639 2020-03-26 23:40:03 Unknown Artist The Master Of Space - Main Menu NOT PLAYED yesterday
16 12397 2020-03-26 23:38:38 Unknown Artist Rygar - Theme 6 PLAYED yesterday at 23:16:42
17 11686 2020-03-26 23:36:30 Unknown Artist Fire & Forget 2 - Level 2 PLAYED yesterday at 23:19:32
18 11238 2020-03-26 23:36:25 Unknown Artist Arkanoid - Theme 7 PLAYED yesterday at 23:40:45
19 13157 2020-03-26 23:36:17 RolandRadio Jingle - MaV (english) PLAYED yesterday at 23:06:59
20 12629 2020-03-26 23:35:20 Unknown Artist The Armageddon Man PLAYED yesterday at 23:33:54
21 11691 2020-03-26 23:34:02 Unknown Artist Fire Land PLAYED yesterday at 23:18:06
22 12876 2020-03-26 23:31:36 Unknown Artist WWF Wrestlemania PLAYED yesterday at 23:37:46
23 12078 2020-03-26 23:29:32 Unknown Artist Liverpool PLAYED yesterday at 23:26:29
1 12039 2020-03-26 23:26:28 Kevin Parker & Mat Something NOT PLAYED yesterday
2 12619 2020-03-26 23:24:18 Unknown Artist Teenage Mutant Hero Turtles PLAYED yesterday at 23:28:33
3 11789 2020-03-26 23:20:57 Unknown Artist Gobot NOT PLAYED yesterday
4 12261 2020-03-26 23:20:21 Unknown Artist Oh Mummy PLAYED yesterday at 23:23:26
5 13087 2020-03-26 23:16:52 Ron Klaren Battle Squadron (Title) NOT PLAYED yesterday
6 13166 2020-03-26 23:16:45 RolandRadio Jingle - robcfg (german) PLAYED yesterday at 22:26:16
7 12870 2020-03-26 23:15:35 Unknown Artist Wonder Boy - Ingame PLAYED yesterday at 23:10:17
8 11419 2020-03-26 23:13:44 Colin Porch Dragon's Lair - Intro PLAYED yesterday at 23:40:52
9 12806 2020-03-26 23:11:56 Unknown Artist Demoniak 4 - Asm PLAYED yesterday at 23:44:03
10 11666 2020-03-26 23:10:42 Unknown Artist Fast Food Dizzy PLAYED yesterday at 23:42:40
11 12391 2020-03-26 23:10:10 Unknown Artist Roland In The Caves NOT PLAYED yesterday
12 11625 2020-03-26 23:09:16 Unknown Artist Dwarf NOT PLAYED yesterday
13 11651 2020-03-26 23:09:11 Unknown Artist Exploding Wall PLAYED yesterday at 23:47:12
14 12753 2020-03-26 23:06:28 Tony Kidjo - (QuasarDisc 2 - Interview) PLAYED yesterday at 23:57:35
15 12450 2020-03-26 23:04:45 Unknown Artist Sirwood PLAYED yesterday at 23:00:25
16 13159 2020-03-26 23:04:37 RolandRadio Jingle - Nilquader (english) PLAYED yesterday at 23:31:22
17 11854 2020-03-26 23:04:04 Unknown Artist Humphrey - Main Menu PLAYED yesterday at 23:40:12
18 11865 2020-03-26 23:03:39 Imagitec Design Inc. The Shoe People - Title PLAYED yesterday at 23:00:01
19 12814 2020-03-26 23:02:04 Unknown Artist Vigilante PLAYED yesterday at 23:11:56
20 11193 2020-03-26 23:00:14 Mark Tait 1943 NOT PLAYED yesterday
Basically, most songs played at 11pm were ALSO broadcast yesterday at the same hour, but in different order!
Maybe your shuffle algorithm could be improved by... simplifying it? Maybe only prevent a song from being played if played 6 hours before or something like that and that's it? But that would be great if you could improve it! Thanks!