Audacity adding "silence" to the exported track.

Hi, this is my first topic here, if you’re doing something wrong I’m sorry.

I am having a problem with Audacity 2.4.2 when exporting my edited track. I noticed that he is adding a small stretch of silence at the beginning and end of the exported track.

I tried to export in .mp3. m4a and the same thing happens. It sounds silly, but for me who is trying to export a show from a band, the silence between the tracks is evident.

I am leaving a screenshot of the problem.

Note: Sorry for my English, I used Google Translate to write the message.

This is a limitation of the MP3 format - there is always a small amount of “padding” at the beginning of an MP3 file.
To avoid this problem, use a different format such as WAV, FLAC or OGG.