Highly suggest you follow the standard multi point "bulletproofing" modifications and inspection on any fastrack switch before installing.
As seen here https://ogrforum.ogaugerr.com/...1#163461606334295091
and here https://ogrforum.ogaugerr.com/...8#162053334063720688
Your problem could be caused by either the folded tab electrical connections causing intermittent ground connection and that can cause spurious anti-derailing triggering. The other known thing is the metal back plate can press up into the terminal area and make contact to the terminal solder joints and cause a similar problem of the weight of the crossing engine pressing down on the switch into the table.
Folded tabs- recommend soldering all of these type of connections