I have an issue with trans to flex plate

The converter builder was a localish old school guy here in Australia who worked on his own in a factory unit in one of Sydney’s suburbs, approximately an hour and a half drive away from my place, all he does is rebuild converters.
I don’t think it is a converter issue as this has sprung up suddenly I get the feeing something has gone or worn inside the transmission as the car was running fine then after having issues starting with the flooding secondaries, the starter then had the issue of occasionally not engaging until now it needs to be moved manually to align the starter and ring gear