+1 on the TLR-7A light turning off under recoil via the "lock out" function.
Recently watched it happen to a friend who was shooting a G19/TLR-7A combo from an ALS holster; no friction on the TLR-7A via concealment kydex holster.
My buddy contacted Streamlight and was told this was not supposed to happen and asked him to send it back. Streamlight replaced the bezel and returned the light which appears to be in working order.
My buddy replaced the TLR-7A with a TLR1-HL but is using the TLR-7A in his training (witness marked the bezel) to see if he can replicate the problem.
After seeing this I brought the issue up at a local match and heard some similar stories from both civilians carriers and armed professionals. It appears this issue may be more widespread than Streamlight wants to admit. Given this light is currently being provided as standard issue to several large federal law enforcement agencies, I suspect this will become a more pressing issue for Streamlight in the near future.
Until Streamlight publicly addresses/fixes the issue I'm a hard no on the TLR-7A. Conceptually, a great piece of kit but execution was sub-par.