I also have been having issues with my Canon flashes dropping their link to the transmitter, this started about 5 years ago and has got progressively worse such that my last shoot the link dropped out hundreds of times and I wasted 3 hours to get 3 shots. Originally I found this with my MK III but has got worse since I purchased my R5 3 years ago. I rang Canon support Australia and they just said bundle up my transmitter, flashed and Camera and post them all interstate and they would look at them. This was an unacceptable solution, I then rang Sun Studios here in Melbourne where I purchased the camera and the person (Rob) who answered the phone knew exactly the problem and indicated that the ‘interference’ was due close proximity to , mobile phone and 5G. This makes sense as this issue is sporadic, location dependent and unpredictable. His solution was to set the Channel of my transmitter and all the flashes to ‘Auto” and ensure that I reset the ID of each of the above to a PIN that I would remember and would be unique. Apparently’Auto’ enables the units to optimise themselves to dynamically choose a Chennel that has minimal interference. I can report that THIS WORKS!!!! I did a shoot today and did not have one link drop out at the previous location where it dropped out after very shot. This problem was causing me such grief I had been professionally embarrassed so many times for ‘wasting’ clients precious time and losing what would have been winning shots, and consequently this has cost my business. I cannot believe that Canon did not know of this problem and its solution and did not let registered camera owners know of this issue and the very easy solution. So good luck and especially a big thank you to Rob from Sun Studios!!!
