Swap messages repeated

Hello,
in several cases my messages to a swap partner were sent , but then repeated few times later at different time without my knowledge. Could be the message was sent, but stayed in some buffer and was sent again when i returned to the swap page?
Could this be some kind of bug?

As an example i attach my message sent 4 times when i was not aware of it:
Ludvikj, 22nd February 2022, 03:23PM
Hello,
Thanks for your swap offer.
Sorry, but i did not find anything interesting for me in your generous swap list.
Maybe next time.
Best regards
Ludvik
Ludvikj, 21st February 2022, 06:02PM
Hello,
Thanks for your swap offer.
Sorry, but i did not find anything interesting for me in your generous swap list.
Maybe next time.
Best regards
Ludvik
Ludvikj, 21st February 2022, 10:15AM
Hello,
Thanks for your swap offer.
Sorry, but i did not find anything interesting for me in your generous swap list.
Maybe next time.
Best regards
Ludvik
Ludvikj, 20th February 2022, 11:03AM
Hello,
Thanks for your swap offer.
Sorry, but i did not find anything interesting for me in your generous swap list.
Maybe next time.
Best regards
Ludvik

When you return to the swap page, do you use the back button in your browser? That button often tries to repost the form that you used to send the message, resulting in double posts. It’s best to use the links in the top menu.

Cita: "smvdbrink"​When you return to the swap page, do you use the back button in your browser? That button often tries to repost the form that you used to send the message, resulting in double posts. It’s best to use the links in the top menu.

​I am not aware , but could be i use the back button in the browser. I will pay attention to it in future.
Thanks.