Eggdrop 1.8.3. This is a tweaked cut from my other script:

proc wilktest:user_kick {nick uhost hand chan whom why} {
	putlog "#DEBUG# user_kick $nick $uhost $hand $chan $whom $why"
	if {[isbotnick $whom]} {
		putlog "#DEBUG# user_kick - me"
		return
	}
	return
}

proc wilktest:chan_mode {nick uhost hand chan mode whom} {
	putlog "#DEBUG# chan_mode $nick $uhost $hand $chan $mode $whom / [isbotnick $whom] [botisop $chan] [wasop $whom $chan] [isop $whom $chan]"
	return
}

bind kick - * wilktest:user_kick
bind mode - *+o* wilktest:chan_mode

The problem is that bot until it goes in sync with channel (get users, +beIR lists) does not trigger events (at least mode events). The test was:

1. kick bot
2. wait until it rejoins channel
3. quickly op it
4. op it again after awhile

Here is the log (most syncing parts removed):

[01/18:07:31] [@] wilk!wilk@somehost KICK #*** somebot :no reason
[01/18:07:31] #DEBUG# user_kick wilk wi wilk #*** somebot no reason
[01/18:07:31] #DEBUG# user_kick - me
[01/18:07:31] [!s] JOIN #***
[01/18:07:31] [s->] JOIN #***
[01/18:07:31] Adding penalty: 3
[01/18:07:31] [@] somebot!~someident@somehost JOIN :#***
[...]
[01/18:07:33] [@] wilk!wilk@somehost MODE #*** +o somebot
[...]
[01/18:07:45] [@] otherbot!otherident@somehost MODE #*** +v somebot
[01/18:07:53] [@] wilk!wilk@somehost MODE #*** +o somebot
[01/18:07:53] #DEBUG# chan_mode wilk wilk@somehost wilk #*** +o somebot / 1 1 1 1

The first +o while bot was syncing with channel was totally ignored.

I've put the same code on 1.6.21 and there is no such behaviour. Every mode is triggered:

[01/18:30:54] [@] wilk!wilk@somehost KICK #*** otherbot :no reason
[01/18:30:54] #DEBUG# user_kick wilk wilk@somehost wilk #*** otherbot no reason
[01/18:30:54] #DEBUG# user_kick - me
[01/18:30:54] [!s] JOIN #***
[01/18:30:55] [s->] JOIN #***
[01/18:30:55] Adding penalty: 3
[01/18:30:56] [@] otherbot!otherident@somehost JOIN :#***
[...]
[01/18:30:58] [@] wilk!wilk@somehost MODE #*** +o otherbot
[01/18:30:58] #DEBUG# chan_mode wilk wilk@somehost wilk #*** +o otherbot / 1 1 0 1
[...]
[01/18:31:22] [@] wilk!wilk@somehost MODE #*** +o otherbot
[01/18:31:22] #DEBUG# chan_mode wilk wilk@somehost wilk #*** +o otherbot / 1 1 1 1