Got a replacement from Wahoo for my Tickr 2 after some problems with HR reading, and I noticed that they changed the strap (Left is the new one) : r/wahoofitness
Wahoo Tickr Review | v2 2020 Gen 2 | Tickr X HRM
WAHOO TICKR 2 HRM — LafoBikes
TICKR Heart Rate Monitor with Chest Strap | Wahoo Fitness