After updating to 1.18.1 (173), I noticed that whenever I try to save a file to an iCloud Drive folder (created well before Bike has its own iCloud Drive folder), there is a good chance that the beachball will appear, forcing me to quit the app abruptly and resulting in the loss of the file’s content.
Since most of time I save my Bike files to that (old) iCloud Drive folder, I’m not sure if this issue also happens on the local drive. This issue occurs frequently in both macOS Sonoma 14.4 and 14.4.1.