Flash is used to display old flash format flyers, so probably not a factor in your issue. @Mike_da_Spikedid make some notes a while back about to correct it though https://forums.gameex.com/forums/topic/27599-guidehow-to-remove-flashocx/
Looking at your logs there doesn't seem to be much of a pattern to the issue - Creature from the Black Lagoon has launched and exited ok in one log but failed in another;
Ok
23:28:06.70 03/07/2024: C:\Visual Pinball\VPX 3D\VPinballX_GL64.exe /play -"C:\Visual Pinball\Tables\3D Tables\Creature From The Black Lagoon (Bally 1992).vpx" -minimized -ini "C:\Users\Pinball\AppData\Roaming\VPinballX\VPX3D.ini"
23:28:06.75 03/07/2024: C:\PinballX\vpauto.exe
23:28:15.09 03/07/2024: Visual Pinball Player window foreground: 8
23:28:30.45 03/07/2024: Exit System Control Pressed
Fail
08:55:02.75 04/07/2024: C:\Visual Pinball\VPX 3D\VPinballX_GL64.exe /play -"C:\Visual Pinball\Tables\3D Tables\Creature From The Black Lagoon (Bally 1992).vpx" -minimized -ini "C:\Users\Pinball\AppData\Roaming\VPinballX\VPX3D.ini"
08:55:02.76 04/07/2024: C:\PinballX\vpauto.exe
So for some reason PinballX isn't recognising that VPX has successfully launched when you see the issue (as there's no 'Visual Pinball Player window foreground' line in the log), and nor does that monitoring process timeout either (no 'Visual Pinball Foreground Timout' message in the log) - but only sometimes(?)
Can you try something Mike suggested, for the VPX 3D system in settings change the system type from 'Visual Pinball' to 'Custom' just as a test (which should stop PinballX checking for the Visual Pinball windows becoming active), and let us know if that makes any difference (and attach a new log copy!).
Also, please confirm that you have exceptions set in antivirus / defender for anything & everything Pinball related and let us know general system health status (plenty of free space on C drive, no other crashes or random error messages popping up, games always launch ok outside PinballX etc)