Kennyp

Just come home from having second service on my 2021 Karoq sel. All fine except both front tyres had an advisory stating minor cracking on the curve between sidewall and main tread area. setvice rep said no problem at moment especially as 5mm tread depth on both (just under 15000 miles from new). My concern is that my previous car Kodiaq developed the same cracking in the same place resulting in me having to change all four tyres but this was after 3 years and 25000 miles. Never experienced anything like this before these two cars (Had an Octavia vrs before the Kodiaq which was fine and had that 8 yrs without any cracking). Tyres on Karoq are Michelin and on Kodiaq were Bridgestone (I think). Anyone had similar and if so what was the cause/solution?