Tested it, this problem also happens with me as well. In everyway as well, even loading one in after adding a title-changing level pack will crash if selected, but it doesn't give me anything.
Crashlog:
An error occurred within SRB2! Send this stack trace to someone who can help!
Time of crash: Mon, 03 Jan 2022 23:40:09 -0500
Cause: Segmentation fault: 11
Backtrace:
0 Sonic Robo Blast 2 0x0000000102b3b1c1 write_backtrace + 481
1 Sonic Robo Blast 2 0x0000000102b3afb9 signal_handler + 25
2 libsystem_platform.dylib 0x00007fff88e4d52a _sigtramp + 26
3 ??? 0x00007fff5d2ba110 0x0 + 140734756528400
4 Sonic Robo Blast 2 0x0000000102b295d3 luaM_realloc_ + 35
5 Sonic Robo Blast 2 0x0000000102b1f758 luaD_reallocstack + 56
6 Sonic Robo Blast 2 0x0000000102b1fb41 luaD_precall + 369
7 Sonic Robo Blast 2 0x0000000102b20530 luaD_call + 80
8 Sonic Robo Blast 2 0x0000000102b33eea luaV_execute + 938
9 Sonic Robo Blast 2 0x0000000102b20541 luaD_call + 97
10 Sonic Robo Blast 2 0x0000000102b1f6f5 luaD_rawrunprotected + 85
11 Sonic Robo Blast 2 0x0000000102b20844 luaD_pcall + 68
12 Sonic Robo Blast 2 0x0000000102b179f2 lua_pcall + 274
13 Sonic Robo Blast 2 0x0000000102b10c80 LUA_LoadLump + 1168
14 Sonic Robo Blast 2 0x00000001029f9204 W_InitFile + 3172
15 Sonic Robo Blast 2 0x0000000102aa9f7c P_AddWadFile + 28
16 Sonic Robo Blast 2 0x00000001029684e8 Command_Addfile + 696
17 Sonic Robo Blast 2 0x000000010294bb43 COM_BufExecute + 275
18 Sonic Robo Blast 2 0x000000010295a234 TryRunTics + 68
19 Sonic Robo Blast 2 0x000000010295eb49 D_SRB2Loop + 329
20 Sonic Robo Blast 2 0x0000000102b3712f main + 559
21 libdyld.dylib 0x00007fff837c15ad start + 1
22 ??? 0x0000000000000001 0x0 + 1
You're not the only one, although I'm a mac user as well, so I can't prove if this happens to window users. I hope this helps.