Actually it was introduced with some version, do not remember exact version. 4.18 stlll holds such issue.
When you select answer Yes, No, any other pre-configured, the recepient will get
Yes (No, etc)
-Sent from my Garmin
It is not convenient. Especially if you use Cyrillic (Russian) language. This message is odd and not translated.
Apple devices have such approach to "spread the word" about their emal clients used, but you can edit and remove such signature. In Garmin you cannot do it.
Is it possible to improve the situation? Imagine you are controlling Telegram bot i.e. and you need to send clear text without any additions. Please, do not add texts without asking customer's opinion. Leave possibility to remove such "marketing" materials.
