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### Description When invoking dialog tracking by flag instead of dlg_manage(), dialog doesn't store uac_replace_* variables. As a result, uac restore functionality doesn't work.

### Troubleshooting

#### Reproduction #!define FLT_DIALOG 4 ... modparam("dialog", "dlg_flag", FLT_DIALOG) ... request_route { if (is_method("INVITE")) setflag(FLT_DIALOG); ... }

Make a call. List dialogs (kamcmd dlg.list) You'll notice the dialog has no _uac_ variables <!-- If the issue can be reproduced, describe how it can be done. -->

#### Debugging Data

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gdb /path/to/kamailio /path/to/corefile bt full info locals list

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``` (paste your debugging data here) ```

#### Log Messages

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#### SIP Traffic

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### Possible Solutions

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### Additional Information

* **Kamailio Version** - output of `kamailio -v`

``` version: kamailio 5.3.8 (x86_64/linux) a58155 ```

* **Operating System**:

<!-- Details about the operating system, the type: Linux (e.g.,: Debian 8.4, Ubuntu 16.04, CentOS 7.1, ...), MacOS, xBSD, Solaris, ...; Kernel details (output of `uname -a`) -->

``` NAME="Debian GNU/Linux" VERSION="8 (jessie)" ```