Within a group, links of messages ("copy link" function) inside one topic when being added ("create link" function) to a word or phrase, which is also inside the other topic, do not lead to the message in the topic, but to the message in "View as messages" mode.
1 group of >1000 members
2 54 topics created (1 message was pinned before enabling topics)
3 copy link of a message inside one topic
4 create a link for a word or phrase in another topic
5 tap on that word/phrase and you will be moved to "View as messages" mode
Telegram Android 9.1.2 (29022), Xiaomi Mi 10T Pro, 12 S? (31)