[Security] IHG website forced password reset?

[Marsonline]

Anyone got this when login from the web today?

Enter the email address associated with your account, and we'll send an email with a link to reset your password. For assistance, contact Customer Care.

Your password must be updated to keep your account secure. Please reset your password.

Also from FT:

IHG Monthly Password Reset? - FlyerTalk Forums

InterContinental Hotels | IHG One Rewards and Intercontinental Ambassador - IHG Monthly Password Reset? - Went to login today and was prompted to enter my email address for a password reset. I just just forced to do it a month or so ago. Are they now going to force a password change monthly? (Or...

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[NM]

I did not receive that when logging into my IHG account this evening. I used my membership number and PIN rather than email address, but doubt that would make any difference. I made a reservation and all went through ok.

Edit: Just tried again using email for login and again not prompted to change my password.