I've been hosting some sessions at HL the last few days & made some observatiions. I've heard about a supposed 'Hosting Bug' wherein the host cannot recover & rejoin the mission he is hosting. In hosting two diff default mp missions, I've come to the conclusion that there is no such bug...but rather just poorly created missions. Exibit A: When hosting the default "H2H_Hogs_and_Frogs.mis" I have no problem recovering & rejoining...however, the main red air base defense unit cannot be locked by the mavs...it locks on a building at the airport only.
Exibit B: When I host the default "H2H_Strike-on-Strike.mis" I can almost never recover & rejoin my session...& the blue side all fly out of the same airport & is defended by ground units...while the red side has one airbase defended by ground units but only the su25's fly out of it, while the su27's are launching from another nearby field..an unprotected one! Since the 'mission goal' of this one is to attack & destroy the enemies airfield, I suggest that these problems are merely the result of hastily created missiions...prolly at the last minute...if someone who has become adept at working with these missions (I haven't) would open them in the editor & have a look, I think you'll find that certain parameters were set incorrectly - thus you can rejoin in the one but not the other & it would also explain why the red defending unit cannot be targeted & why half of the red air units fly out of the wrong airbase...so, no bug here...just flawed mission creation...should be fixed easily by those who can edit missions knowledgably...just my observations, thus far.