I saved the shot and recorded a video as evidence. Normally, I wouldn't even bring this up in this forum, but as it happens, this occurred on what is arguably the BEST tournament I have ever played! It currently has me as #1 on the leaderboard, but if that 3 shot swing costs me the tourney win...well...that would SUCK!

I am not sure if there is precedent for correcting a 3 stroke difference due to a game glitch, but if there is, I would definitely appreciate it. A link to the video is provided below. In the video, the ball clearly goes in the hole...you even hear it tap the flag stick...then 6 seconds later...out she comes.
https://youtu.be/qZ3aN78CiLU