from irc.oftc.net #tor
The issues comes from v2.0 custom addresses. If you want a custom url, you're going to lose connectivity reliability.
v3.0 (your default) will not experience the same problems.
If you absolutely must use a custom v2.0 address, you must develop a schema that incorporates the use of both v2.0 and v3.0 such as hyperlink anchor tag ...