FTPs can not connect two Amaze

[mahengrui1]

Describe the bug
Under an Android hotspot, two Androids both run Amaze, one set up FTPs server and another connects to it. Start downloading file.

The file list can be seen, but slow when more than 300 files. The targeted file can be created with size 0B.

Expected behavior
File transfer fast.

Smartphone (please complete the following information):

• Device: LineageOS and Samsung
• OS: Android 13 and 11
• Rooted: Yes and No
• Version: 3.11.2

[EmmanuelMess]

This is actually a very good test to add to the automated test suite.

[EmmanuelMess]

Ping @TranceLove .