For the purposes of reproducing this bug, I'll use the mapset Resurgence, and Samsara v0.3666 will be used for the gameplay mod. It doesn't matter what order they are loaded in, as the bug will occur regardless. When the game is loading, it will print out multiple copies of "Bad numeric constant" followed by a number and an actor property. This can be verified by going into the console and scrolling upwards. With some total conversions like Batman Doom, these error messages can take about a minute to fully scroll through in the console because of the large amount of actors modified by DeHackEd. The screenshot below is an example of what the console prints in GZDoom 4.10.0 using Resurgence and Samsara.

I wanted to report this since it can make compatibility with certain gameplay mods iffy on GZDoom 4.8.0+ compared to older versions, and I haven't seen anyone else report it on the fourms. I apologize for not having easily accessible test files to provide, but these files are easy to obtain and should be able to load into GZDoom without taking too much time.