I'm using ImmersiveRailroading-1.7.3_1.12.2 on a server. The server spams these error's multiple times a second.

[23:02:14] [Server thread/WARN] [net.minecraft.tileentity.TileEntity]: Skipping BlockEntity with id
[23:02:14] [Server thread/WARN] [universalmodcore]: BAD TE DATA {controlMode:0,parent:{X:0,Y:0,Z:8},railHeight:0.0f,flexible:0b,snowLayers:0,couplerMode:0,version:3,redstoneMode:0,height:0.0f}

This fills up my logs and makes them multiple gigabytes big.

This can also be caused by the trafficcontrol mod, this is something I've had experience with.

This is known, the BAD TE DATA is pending an update release and has been patched.

Fixed in the test-builds, will be in the next release.