@KlaudiyaG @ErmesT
Update - Investigation Report:
Step #1
My sample is based on Connect posts from 31st December (included) until today.
I counted 40 people on my following list. The order in which the people were listed was alphabetical and thus not allowing me to recognize a cut-off time-wise since old and new people I follow are being mixed up.
21 out of the 40 people did not post during the sample period.
12 people that posted, did show up on my f**ollowing timeline.
7 people that did post did not show up!
Step #2
I cleaned up my list and removed 12 inactive persons (unfollowed).
All 7 missing people (based on sample period) now show up on my following timeline!
The assumption now is that 30 people might be the following limit…
Since I got this far with my testing, why not check this hypothesis.
Step #3
I added two people (active people with recent posts) to bring my cleaned list from 28 back to 30 people.
Strangely, from the two additional persons, only the last person I added shows up in the timeline, person #29 does not show up in my timeline. For later reference, I call this person X. So now I am wondering, is the limit 29 OR is the limit even lower, since 9 people of my current list have not posted during the sample period.
The figures, 9 and 29 lead me to suspect that the algorithm of Connect’s forum-application might only go up to 20 active people on one’s following timeline. That would explain why one of the two active people I just added did not show.
To test this hypothesis, I plan to remove 10 people to get to a list of 20 active persons that I follow.
Step #4
After deleting a further 4 inactive persons, I get a hunch that my line of thought might be flawed and that I should take smaller steps. I check my following timeline and find that I now have 21 active people showing! Person #29, added to the list, Mr. X is now showing.
So perhaps the maximum limit is 29 people after all? 
Step #5
From my list of 30 I had omitted 4, so I needed to add 3 to get back to 29. On my wish-list were 3 more people of which one person was not active during the sample period. I added all three, making sure that the last person added is actively posting.
Only 22 active people are now showing from my list of 29 following (of which 23 active during sample period). Mr. X is missing again!
Remember, I added 3 people of which one was inactive. So, let’s take people away again, one by one this time.
Step #6
I start with removing the inactive people and the first person to be removed is the last inactive person (the one out of the last three) that I added.
I check, no Mr. X…
I remove a second inactive person. I check, no Mr. X.
I remove a third inactive person. Mr X is back!
Now I have 23 active people all showing from my total list of 26!
Okay, let’s remove the remaining 3 inactive persons and see how many more active people I can add…
Step #7
After removing the remaining 3 inactive persons, bring my list to 23 active people, I add one. This latest person and Mr X are still showing (for now, I am not going to verify all 24).
So let’s add active person 25… and I find this person and Mr. X showing.
The next person would bring back my list to 26, let’s see… This time I verified all 26 persons and person #26 (the last one I added) is the only one not showing!
Preliminary conclusion, could it be that the limit is 25 people one can follow on Connect?
Well, that was a few hours well spent, lol. Anyone, willing to confirm the 25 limit?
Yours, JeroenM