(1) I have a polar express engine from the 6-31960 set that stalls with my o22 right hand switch track. The engine goes into neutral about half-way through the switch's turnout. I have a second right-hand switch track on my layout and the engine runs fine through it all the time.
(2) Same right-hand switch track, i have an mth ps2 30-1164 has its front pivoting wheels consistently derail to the right when it runs straight through the switch track opposite of the turnout. It also derails the same exact way on my second right-hand switch too. If the engine goes straight through the switch track in the opposite direction it does not derail; also going through the turnout is fine, no derailing.
If anyone needs pictures and even a quick video if it is possible to have as an attachment, I can accommodate.