Using Safari & haven't had the problem described.
Emptying the cache at least once a week (if not daily) is "Good Housekeeping."
Leica M3 50mm Summicron
Leica IIIa 50 mm Elmar, 50mm Summitar, 90mm Elmar
Bessa R2 50mm Color Skopar, 90mm Lanthar
Kiev 4am 50mm Helios 103