HP 15C CE key bounce

[Rick314]

I am now on my 4th unit with excessive key bounce:
Lot number 9CJ323, serial number 03528, new, eBay, eldoradotrading, returned.
Lot number 9CJ323, serial number 03553, new, eBay, eldoradotrading, returned.
Lot number 9CJ323, serial number 03930, new, eBay, samsoncableshpcalculators, returned.
Lot number 9CJ351, serial number 13105, new, https://hpofficesupply.com.

As others have commented, the problem can be avoided with more careful key pressing. But I still run into it often with frequent calculator use.