Riley Park

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Thank you for your report!
We're actually already tracking this issue in MCPE-67169, so I've resolved and linked this ticket as a duplicate.

If you would like to add a vote and any extra information to the main ticket it would be appreciated.

If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.

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Thank you for your report!
We're actually already tracking this issue in MCPE-67169, so I've resolved and linked this ticket as a duplicate.

If you would like to add a vote and any extra information to the main ticket it would be appreciated.

If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.

Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki

Confirmed for 1.14 and 1.14.1-pre2.

I've attached two screenshots of this, based on the last screenshot example in https://bugs.mojang.com/browse/MC-48904 (found that issue before this one).

/tellraw @p [{"text":"["},{"text":"Tip","color":"green"},{"text":"] Follow us on "},{"text":"Twitter","color":"aqua"},{"text":" at: "},{"text":"www.twitter.com/SurvivalCraftMS","color":"dark_aqua"},{"text":" for the latest updates to our server!"}]

This is still an issue as of 17w50a.

Starting with Minecraft 1.9 (and most likely 1.9 snapshots) text components are not directly deserialised - instead they pass through a non-lenient `JsonReader`. When sending a `null` header and footer from a server to a vanilla client, this exception occurs:
When using the lenient deserialiser: https://gist.github.com/kashike/ce389d81d105cbf2b1c484e12ab30160
When using the same deserialisation (`GSON.fromJson`) as 1.8: https://gist.github.com/kashike/82489e367750fa70825d3d91f772de48

The issue introduced with 1.9 makes it impossible to send a `null` `Component`, further removing the ability to *remove* the header and/or footer - it is still only possible to make it empty (due to it calling `getFormattedText`, which `isEmpty` is *never* true on), as described earlier in the issue.
The original issue here still remains and is still within the client packet listener, due to it calling `getFormattedText` on a null `Component`:

// SRG: func_175096_a
    public void handlePlayerListHeaderFooter(SPacketPlayerListHeaderFooter packetIn) {
        this.gameController.ingameGUI.getTabList().setHeader(packetIn.getHeader().getFormattedText().isEmpty() ? null : packetIn.getHeader());
        this.gameController.ingameGUI.getTabList().setFooter(packetIn.getFooter().getFormattedText().isEmpty() ? null : packetIn.getFooter());
    }

This was fixed in 1.11 - I forgot to close this issue.

Could you explain why you marked this as invalid? The formatted text length is never zero - getFormattedText adds §r even if the provided text is empty - which means that there is no way to remove the header or footer, just make empty text/§r appear.