Downloads stop suddenly in 5ghz only

Without the possibility of using a wired connection, I use a Wifi connection via tplink router an Intel Wifi 6E 160MHz card(latest Intel driver installed) on Windows 10. I use an application (latest version) to legally download France TV videos. However and only on this application, downloads pose a problem and stop suddenly or during operation and the application no longer responds when the connection is positioned on the 5GHz band, this band is potentially suitable for higher speeds on all browsers (Firefox, Edge, Chrome, etc.). I noticed 14% errors of tranmissions. This flow break does not

Question by DM7823145 on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.